scholarly journals Direct Synthesis of Functional Zeolitic Materials

2012 ◽  
Vol 2012 ◽  
pp. 1-24 ◽  
Author(s):  
Manuel Moliner
Keyword(s):  
Molecular Sieves ◽  
Direct Synthesis ◽  
One Pot ◽  
Potential Applicability ◽  
Direct Preparation ◽  
Template Free ◽  
The One ◽  
Zeolite Growth ◽  
Zeolitic Materials

Recently, the direct synthesis of zeolitic materials has received much attention because several well-defined functionalities have been introduced in those materials by “one-pot” methodologies. The rationalization of the physics and chemistry of the processes involved in the zeolite growth has allowed the direct preparation of different functional molecular sieves with unique properties and potential applicability in industry. In the present paper, the “one-pot” preparations of metal-containing zeolites (both in framework and extra-framework positions), hybrid organic-inorganic molecular sieves, hierarchical microporous mesoporous zeotypes, nanosheets, nanozeolites, or template-free molecular sieves are intensively evaluated.

A choline chloride/DMSO solvent for the direct synthesis of diformylfuran from carbohydrates in the presence of heteropolyacids

2015 ◽  
Vol 17 (8) ◽  
pp. 4459-4464 ◽  
Author(s):  
W. Ghezali ◽  
K. De Oliveira Vigier ◽  
R. Kessas ◽  
F. Jérôme
Keyword(s):  
Choline Chloride ◽  
Direct Synthesis ◽  
One Pot ◽  
Keggin Heteropolyacids ◽  
The One

Here we report the one pot conversion of fructose to DFF in the presence of a mixture of choline chloride (ChCl) and DMSO as a solvent and Mo-Keggin heteropolyacids.

A Three-Component Reaction for the One-Pot Preparation of β-Amino-α,α-Difluoroketones from Trimethyl(trifluoromethyl)silane (CF3TMS), Acylsilanes and Imines

Synthesis ◽  
2017 ◽  
Vol 49 (17) ◽  
pp. 4082-4092 ◽  
Author(s):  
Aurélien Honraedt ◽  
Lucía Méndez ◽  
Jean-Marc Campagne ◽  
Eric Leclerc
Keyword(s):  
Catalytic Amount ◽  
Fluoride Anion ◽  
One Pot ◽  
Three Component Reaction ◽  
Brook Rearrangement ◽  
Direct Preparation ◽  
Diphenylphosphinyl Imines ◽  
The One

A methodology allowing the direct preparation of β-amino-α,α-difluoroketones from the Ruppert–Prakash reagent (CF3TMS), acyltrimethylsilanes and N-Boc or N-(diphenylphosphinyl)imines is reported. The process, initiated by a catalytic amount of tetra-n-butylammonium difluorotriphenylsilicate (TBAT), involves the addition of CF3TMS to the acylsilane, followed by a Brook rearrangement and elimination of a fluoride anion. The latter promotes the addition of the resulting difluoroenoxysilane to the imine. The higher electrophilicity of the acylsilane compared to the imine allows the direct mixing of all the reagents in a three-component, one-pot process.

A self-assembled octanuclear complex bearing the uncommon close-packed {Fe4Mn4(μ4-O)4(μ-O)4} molecular core

2015 ◽  
Vol 44 (33) ◽  
pp. 14918-14924 ◽  
Author(s):  
Oksana V. Nesterova ◽  
Eduard N. Chygorin ◽  
Vladimir N. Kokozay ◽  
Irina V. Omelchenko ◽  
Oleg V. Shishkin ◽  
...  
Keyword(s):  
Schiff Base ◽  
Direct Synthesis ◽  
Synthesis Method ◽  
Schiff Base Complex ◽  
Metal Core ◽  
One Pot ◽  
Base Complex ◽  
Molecular Core ◽  
The One ◽  
Heterometallic Compound

An Fe/Mn Schiff base complex with an unprecedented metal core type for a heterometallic compound, has been prepared by the one-pot direct synthesis method and magnetostructurally characterized.

scholarly journals Direct Synthesis of Propylene from Ethylene: catalysts and process es

2019 ◽  
Vol 62 (1-2) ◽  
pp. 110-116
Author(s):  
E.A . Buluchevskiy ◽  
T.R . Karpova ◽  
L.F. Sayfulina ◽  
A.V. Lavrenov
Keyword(s):  
Molecular Sieves ◽  
Heterogeneous Catalysts ◽  
Direct Synthesis ◽  
Mesoporous Molecular Sieves ◽  
One Stage ◽  
The One ◽  
Nickel Tungsten

Promising technologies for a one-stage production of propylene from ethylene were considered. The basic types of catalysis systems used as heterogeneous catalysts for the one-stage production of propylene from ethylene were presented. These are zeolites, silicoaluminophosphates, mesoporous molecular sieves, nickel-, tungsten-, molybdenum- and rhenium-containing catalysts.

An Efficient One-Pot Protocol for Direct Access to Diarylmethyl Thioglycosides with para-Quinone Methides via S-Glycosyl Isothiouronium Salts

Synlett ◽  
2020 ◽  
Vol 31 (17) ◽  
pp. 1713-1719
Author(s):  
Pintu Kumar Mandal ◽  
Atul Dubey
Keyword(s):  
Boron Trifluoride ◽  
Boron Trifluoride Etherate ◽  
Quinone Methide ◽  
Direct Access ◽  
Quinone Methides ◽  
Reaction Conditions ◽  
One Pot ◽  
Direct Preparation ◽  
The One ◽  
Rapid Conversion

An efficient one-pot protocol has been developed for the direct preparation of diarylmethyl thioglycosides starting from per-O-acetylated sugars via glycosyl isothiouronium salts. The one-pot reaction conditions involve rapid conversion of the per-O-acetylated sugar with thiourea in the presence of boron trifluoride etherate as catalyst to give the corresponding glycosyl isothiouronium salt, which is subsequently treated with a para-quinone methide in the presence of a base to give the a diarylmethyl thioglycoside in excellent yield.

One-Pot Three-Component Synthesis of 2,4,5-Triaryl-1H-imidazoles in the Presence of a Molecular Sieve Supported Titanium Catalyst under Mild Basic Conditions

Synlett ◽  
2018 ◽  
Vol 30 (01) ◽  
pp. 89-93 ◽  
Author(s):  
Zoltán Hell ◽  
Ágnes Magyar
Keyword(s):  
Heterogeneous Catalyst ◽  
Molecular Sieves ◽  
Molecular Sieve ◽  
Ammonium Acetate ◽  
Condensation Reaction ◽  
Significant Loss ◽  
One Pot ◽  
One Pot Condensation ◽  
The One ◽  
Efficient Heterogeneous Catalyst

A series of 2,4,5-trisubstituted-imidazoles has been synthesized with good to excellent yields by the one-pot condensation reaction of 1,2-dicarbonyl compounds, benzaldehydes, and ammonium acetate in the presence of 4 Å molecular sieves modified with titanium(IV) as an efficient heterogeneous catalyst. The catalyst could be recovered easily and reused without significant loss of activity.

Heterogeneous catalysis for the direct synthesis of chemicals by borrowing hydrogen methodology

2015 ◽  
Vol 5 (3) ◽  
pp. 1412-1427 ◽  
Author(s):  
Ken-ichi Shimizu
Keyword(s):  
Heterogeneous Catalysis ◽  
Transition Metal ◽  
Hydrogen Transfer ◽  
Direct Synthesis ◽  
Metal Catalysts ◽  
Transition Metal Catalysts ◽  
One Pot ◽  
One Pot Synthesis ◽  
Borrowing Hydrogen ◽  
The One

This review summarizes the recent examples of hydrogen transfer-type reactions using supported transition metal catalysts with special emphasis on the one-pot synthesis of chemicals by borrowing hydrogen methodology.

Convenient One-Pot Synthesis of 9H-Carbazoles by Microwave Irradiation Employing a Green Palladium-Based Nanocatalyst

Synthesis ◽  
2021 ◽  
Author(s):  
Darío C. Gerbino ◽  
H. Sebastián Steingruber ◽  
Pamela Mendioroz ◽  
María A. Volpe
Keyword(s):  
Microwave Irradiation ◽  
Direct Synthesis ◽  
Reaction Times ◽  
One Pot ◽  
One Pot Synthesis ◽  
Ligand Free ◽  
Palladium Catalyzed ◽  
Scalable Synthesis ◽  
The One ◽  
High Yields

AbstractAn efficient palladium-catalyzed tandem reaction for the one-pot synthesis of 9H-carbazoles under microwave irradiation is developed. This approach involves a sequential Buchwald–Hartwig amination and a direct arylation from affordable and inexpensive anilines and 1,2-dihaloarenes. For the development of this purpose, a novel and magnetically recoverable palladium nanocatalyst supported on a green biochar under ligand-free conditions is used. Compared to other existing palladium-based protocols, the present synthetic methodology shows a drastic reduction in reaction times and excellent compatibility with different functional groups allowing to obtain a small library of 9H-carbazoles in high yields and with good regioselectivity. This procedure represents the first example in the direct synthesis of carbazoles using a heterogeneous palladium nanocatalyst from commercial precursors. To examine the application of this protocol, a direct and scalable synthesis of the bioactive carbazole alkaloid clausenalene from commercially available starting materials is described.

The direct synthesis of symmetrical disulfides and diselenides by metal–organic framework MOF-199 as an efficient heterogenous catalyst

RSC Advances ◽  
2015 ◽  
Vol 5 (106) ◽  
pp. 87564-87570 ◽  
Author(s):  
Mohammad Soleiman-Beigi ◽  
Issa Yavari ◽  
Fatemeh Sadeghizadeh
Keyword(s):  
Polyethylene Glycol ◽  
Metal Organic Framework ◽  
Direct Synthesis ◽  
Aryl Halides ◽  
One Pot ◽  
Metal Organic ◽  
Heterogenous Catalyst ◽  
The One ◽  
Symmetrical Disulfides ◽  
Efficient Heterogeneous Catalyst

The MOF-199 was used as an efficient heterogeneous catalyst for the one-pot synthesis of organic disulfides/diselenides from aryl halides and elemental S/Se in polyethylene glycol (PEG) with good to excellent yields.

Direct synthesis of α-aminophosphonates from biomass resources catalyzed by HReO4

2018 ◽  
Vol 20 (14) ◽  
pp. 3242-3245 ◽  
Author(s):  
Vera M. S. Isca ◽  
Ana C. Fernandes
Keyword(s):  
Direct Synthesis ◽  
One Pot ◽  
Efficient Catalyst ◽  
Biomass Resources ◽  
The One ◽  
Heteroatom Compounds

HReO4 as an efficient catalyst for the one-pot sustainable synthesis of heteroatom compounds, containing N and P atoms, directly from biomass resources.

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